Because you like Niko Bellic in Grand Theft Series
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
Amy Farrah Fowler deserves sainthood for putting up with Sheldon Cooper. See them in The Big Bang Theory.
Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.
Holden Caulfield is convinced that the whole adult world is full of phonies. See them in The Catcher in the Rye.
When push comes to shove, the usually overly cautious Luigi has the heart of a hero. See them in Super Mario Bros..
Darcy Lewis is a razor-sharp scientist studying things that science can't explain. See them in Thor.
A crooked cop, Harvey Bullock is the product of a not-so-just criminal justice system. See them in Gotham.
Shuri is a genius-level inventor with a wicked sense of humor. See them in Marvel Cinematic Universe.
A homeless orphan with unusual red hair, Anne knows the odds are against her. But she's starting to find her inner power. See them in Anne With an E.
A sarcastic and nosy tomboy, Stephanie Tanner is understandably not crazy about being the middle child. See them in Full House.
Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.